Digging up an old thread...
But, in my defence, I wanted to know if anyone has bought the #6 shiftmate to do the road STI lever to dynasys MTB mech as suggested in the last post?
Road STI (2.3mm pull) is designed for a 1.7:1 ratio rear mech to give the 3.9mm shift for 10sp.
Dynansys being a 1.2:1 ratio is designed to work with the newer 3.2ishmm pull MTB levers, the difference in ratios is what the #6 is fixing.